Double-acting pump.



, ltain new and useful Improvements Double-Acting Pumps; and Ido hereby de- UNITED strA'rEs PATENT IorlillCE,`

CHARLES N. sIMoNsN, or Esamina,` soU'rH DAKOTA. l

DOUBLE-'Admins PUMP.

l PatentetlOct. 31, 1916;.,

Applftation'led March 29,1915. 'Serial No. 17,764.

To all whom t may concern:

Beit known'that I, CHARLES N. SiMoN- soN, a citizen of the United States, residing at Esmond, in the county "of Kingsburyand State of South Dakota, have invented cerclare the following to be a full, clear, and exact description of the invention, suchv as -vvill enable others-skilled in the art to which it appertains to make and use the same.

This invention relates to double acting air pumps, the principal object of which is to provide a pump of simple construction in which the pump piston will draw air in and force air outsat each movement thereof in the-pump cylinder.

Another object of the invention is to providedf` Apump of simple construction for forcing ain-at each movement of the piston, and to provide intake check. valves and outlet check valves to operate alternately for taking in and forcing out air from the pump casing.

The foregoing and other objects maybe [attained by'means of the construction illustratedA in the accompanying drawing, in

which the figure of the drawing is a vertical sectional view taken through a double acting pump made in accordance withlthis invention.

Referring to the drawing, the numeral 1 vdesignates the pump cylinder or casing, the

lower end of which is connected to a base 2 by means of exterior screw, threads 3 which engage the interior screw threads ofl an upwardly extending boss t onthebase. The cylinder 1 at its upper end is provided with a vsuitable head 5 connected by screw threads 6 inside the casing, said head 5 being provided with va stuffing box 7 and a piston rod 8 extending through the stufling box and through the'head 5. Secured to the inner end of the piston rod 8 is a piston head Comprising a core 9, leather packing washers 10 upon each side thereof and washers 11 of metal, said core, leather washers and metal washers being connected t0 the threaded end 12 of the piston rod by means of locknuts 18 and 14, and the outer ends of the leather washers 10 projecting in opposite directions, as shown, tov make an air tight joint between the piston head and the inner wall of the cylinder or casing 1. The outer end of the piston rod 8 is provided with a suitable handle 14a.

.in the nipple.

v ,A valve .casing 15 connected to the 'base 2, and an intake'duct 16 extending through the 'base communicates with the interior of thecylmder at oneendwhile the opposite end `communicates 'with the valve casing""152 The valve casing 15 is spaced-from'the louter I@ trolled by a -ball valve 19 'hav-'ing a stop'20 A ball valve seat 21 is formed in the valve casing 15, and a ball valve 22 is disposed above the seat 21 and -is provided with a stop 23.

'The cylinder head is provided with an l intake duct 16a which communicates with a valve casing 24 having an inclined intake nipple 25 provided with an intake port 26 and a ball valve 27 for controlling said port, said ball valve having a stop 28 extending across. the nipple 25. 25 are disposed between the valve casing and the cylinder, to be entirely out of the way so that they will not be liable to be knocked olf or injured by coming into contact. with some other article. In the valve casing 24 is a valve seat 29 controlled by a ball check 3()v having a stop 31. The valve casings 15 and 24 are connected by an outlet tube or pipe The nipples 17 and 31a, by means of suitable unions 32 and 33.

valve 27 and to unseat the valve. 30 and permit the air fto be forced out through the nipple 34. At the downward stroke of the piston head, the valve 27 is unseated, the valve 30 is seated and the valve 19 is seated .and the valve 22 raised from its seat to permit the air to pass out through the nipple 3l, as will be obvious.

From the foregoing it will be obvious that the pump is extremely simple in construction, cannot readily get out, of order, can be manufacturedV at ylow cost, and is very efficient for its purpose, since it forces air out through the nipple 34 at each movement of the piston yhead in the cylinder.

forced out through .the duct 16a to-seat the said flange, a. headserew threadedly fitted in.

the upper end of said cylinder, a central v opening in Said head, a stuffing box fitted in said opening, a. piston rod Slidably mounted through said stuffing boX into said cylinder, a piston head on the inner end of said rod.l a valve easing secured to the upper face of said base at spaced distance :troni said Cylinder, said base provided With an air duct coinmunicating at one end With the cylinder and its opposite 'end with thel valve easing, a seeond valve casing formed onv and extending from the head of the cylinder, said head and valve casing provided with an air passage v establishing communi :ation between the cylinder andthe Seeond valve Casing, said valve casings each having an inclined intake nipple provided'each with a port -and a ball valve, check valves in the valve -casings, and a discharge pipe connected at its upper and lower end to the valve easings and `communieating therewith, 1n-outlet pipe intermediate the ends of the discharge whereby upon an upward stroke of thepiston rod the fluid Will be discharged through the upper valve easing and out through the dischargev pipe andr upon the downward stroke the operation is repeated only through the valve Casing oneV SIMONSON.

lfVitnesses t THnononn I. FLITTIE, C. T.,L1DDLE, P. SJYDER. 

